Tutorial Exercise Find the domain, x-intercept, and vertical asymptote of the logarithmic function and sketch its graph. y = log(x - 3) + 5 Step 1 Recall that the domain of a function is the set of values x for which the function is defined. Note that the logarithmic function is defined only for positive numbers. This means y is defined only if >0. Solve this inequality. X > Therefore the domain of the function is x > Write the domain using interval notation